Extension light clamp



May 15, 192s.

S. L. GERARD EXTENSION LIGHT CLAMP y Filed Sept. 30 1927 [n Telital 5&6@ gera/"J 1 81% www] Patented May 15, 1928.

` UNITED STATES PATENT OFFICE'.

SHELBY L. GERARD, F SYPARTA, ILLINOIS.

EXTENSION LIGHT CLAMP.

Application'led September 30, 1927. Serial No. 223,090.

This invention relates to clamps adapted particularly for use in attaching trouble or extension lights in adjustable posit-ion and enabling the light to be suspended in convenient posit-ion for use by a workman under COIldtiODs where the work requires the use of both hands.

The invention has for an object to provide a clamp of this character' which may be easily, quickly and securely attached in adjusted position toany stationary object, which is simple and practical in construction, inexpensive to manufacture, and otherwise Well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the special construction and combination of the various elements comprising a part of this inventionLreference being had to the acceuipanying drawings forming a part hereof,

wherein Figure 1 is a top plan view, the extension light supporting arm being shown in dotted and full lines whereby to indicate the extreme adjustable positions thereof, and,

Figure 2 is a side elevational view of the device.

Referring to the drawing in detail, the invention comprises a clamping arm 5 having so one end formed into a clamping jaw 6 and its opposite end provided with a threaded screw 7 upon which is pivotally mounted an adjusting arm 8.

Intermediate the ends of the arm 5 is arranged a pair of laterally extending lugs 9 extending in parallel relation from one face thereof and between which a pin 10 is extended in transverse position with respect to the arm. A coil spring l1 is mounted on the pin between the lugs 9 having its ends 12 extending longitudinally with respect. to the arm, one of the ends of the spring being arranged in overlapping relation beneath the arm and the opposite end being arranged in similar relation with respect to a movable arm 13 and secured thereby in spaced parallel relation with respect to the arm.

The opposed faces of the arm 5 and the movable arm 13 are recessed transversely as indicated at 14 to provide a seatfor the spring 11 whereby to prevent longitudinal slipping movement therebetween. The end of the movable arm 13 is formed into a gripping jaw 15 and coacting with the jaw 6 of the arm 5 whereby to enable an object to be retained therebetween in gripping relation.

The opposite end of the movable arm 13 is offset as indicated at 16 and forms an operating handle for moving the jaw end ol the arm against the tension of the spring whereby to open the jaw.

'lhe adjustable arm 8 is adapted to be angular-ly adjusted with respect to the arm 5 along a horizontal plane, utilizing the screw 7 as a pivot enabling the arm to be moved ineither of the positions as indicated at Fig. 1 or into any intermediate position between a position at right angles with respect to the arm 5.

The adjustable arm 8 has its outer end formed similarly with the end of the arm 5 and is likewise provided with a similar movable arm 13 as provided for cooperation with the arm 5 to constitute a clamping member.

'lhe various arms combining to form the invention are preferably formed of thin metal strips of sutlicient rigidity to'support a trouble or extension lamp at one end thereof and the respective movable arms 13 may be mounted in the same relative position with respect to the arms 5 and 8 or may be secured to the opposite faces thereof as indicated in Figure 2 of the drawing.

Thescrews 7 carries an adjusting nut 17 enabling the adjusting arm 8 to be secured in adjusted position with respect to 'the arm 5.

lf desired, the opposed faces of the respec tive jaws may be provided with a lining of relatively soft material such as rubber or felt padding, to prevent injury to the objects clamped therebetween.

In placing the invention in practice, it is apparent that the jaws G and 15 may be clamped about any stationary object and the wiring of a trouble or extension lamp secured in position between the jaws of the adjustable arm 8 and the light will thus be suspended in a desired position. With the arm 5 extending in a horizontal plane it will be apparent that the adjustable arm 8 may swing about its pivot likewise on a horizontal plane enabling the light to be moved into various adjustable positions in order to derive the best advantages `from the use thereof.

It is obvious that the invention is susceptible of various changes and modifications Without departing from the spirit orscope of the appended claims or sacricin any of its advantages, and I accordingly c aim all surh forms of the device to which I am entitled.

I claim l. In a device of the class described, a clamping arm having one end formed into a jaw, an adjustable arm pivotally attached at the opposite end thereof, a pair of laterally extending lugs formed on said arm intermediate the ends thereof, a pin extending therebetween, a coil spring arranged thereon, a movable arm mounted above said first-named arm in super-imposed relation, said spring yhaving its ends extending in overlapping relation upon said arm where by to retain the same in clamping position with respect to each other, said clamping arm and movable arm combining to form a clamping member and a similarly formed clamping member arranged at the outer end of said adjustable arm.

2. A double ended clamp pivotally connected at one end for swinging movement about a common axis and each formed with an individual clamping member at their outer ends, said clamping member comprising a stationary jaw having a pair of spaced parallel lugs extending at right. angles there from, a movable jaw associated with the stationary jaw and having similarly formed lugs, a pin extending through each of said lugs forming a fulcrum for the jaws, the shank end of said movable jaw being formed into a handle arranged in offset relation with respect to the shank end of said stationary jaw and movable toward said jaw for the Opening movement of the jaws and a spring having its intermediate section coiled about said pin and its end extending toward the jaw end and transversely across the opposite jaw faces whereby to yieldably retain the jaws in closed position.

In testimony whereof I affix my signature.

SHELBY L. GERARD. 

